"Pet Graveyard" is a real movie coming out on DVD and digital ahead of "Pet Sematary." Paramount, Uncork'd Entertainment

Remember when "Finding Nemo" and "Shark Tale" were released around the same time? Or when "Batman v Superman: Dawn of Justice" and "Captain America: Civil War" came out just months apart?

It's not the first time two movies with similar themes have come out around the same time. In April, a movie called "Pet Graveyard" will be out on DVD and digital days before Stephen King's "Pet Sematary" remake comes to theaters.

This phenomenon of "twin" movies is actually somewhat common. Forbes contributor Mark Hughes explained in a 2011 Quora post that while sometimes the release of two similar films is just coincidence, it could be to piggyback off a competitor's potentially successful — or already successful — project.

Read the rest of his explanation here, and keep scrolling to see more "twin" films that have come out months apart in theaters over the years.

1/

1993/1994: "Tombstone" and "Wyatt Earp" are both centered around Western lawman Wyatt Earp.

The posters for "Tombstone" and "Wyatt Earp."
Warner Bros./Buena Vista

1997: "Dante's Peak" and "Volcano" both revolve around the cast outrunning erupting volcanoes.

Fox got a little excited with its over-the-top posters for "Volcano." The film did nowhere near as well as Pierce Brosnan's volcano epic in the states; however, the Los Angeles centered movie picked up overseas.

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1998: The Earth was nearly destroyed in both "Armageddon" and "Deep Impact."

1998/1999: "The Truman Show" and "EDtv" both follow men whose lives are being filmed 24/7.

Both films revolve around reality shows. The main difference is that Ed (Matthew McConaughey) agrees to have his life filmed while Jim Carrey's character, Truman, doesn't know he's being filmed on "The Truman Show."

"The Truman Show" was nominated for several Academy Awards including best director.

6/

2000: Both "Mission to Mars" and "Red Planet" follow explorations to the planet that go awry.

2002: "Phone Booth" and "Liberty Stands Still" hold the main characters hostage at one point for the film's entirety.

Colin Farrell locked himself in a phone booth for the duration of the first film while being held at gunpoint. In the latter, Linda Florentino locks herself to a hot dog vendor's cart filled with explosives for the movie. Both must stay on phones or they'll die.

*The film was released in the US on DVD.

8/

2003/2004: A year after Disney's beloved "Finding Nemo" came to theaters, Will Smith tried to charm audiences as a fish in "Shark Tale."

2010/2011: "The Fighter" and "Warrior" are both about brothers fighting in tournaments.

Christian Bale and Mark Wahlberg starred in David O. Russell's film about boxer Micky Ward in December 2010. Tom Hardy and Joel Edgerton played brothers less than a year later who sign up for a mixed martial arts tournament.

"No Strings Attached" was originally going to be called "Friends With Benefits" after its original working title "F--- Buddies" wasn't ever going to get cleared by the Motion Picture Association of America. However, Justin Timberlake and Mila Kunis' film already had that title.

21/

2012: Two versions of the same princess tale starring Kristen Stewart and Julia Roberts debuted, "Snow White and the Huntsman" and "Mirror, Mirror."

The posters for "Snow White and the Huntsman" and "Mirror Mirror."
Universal / Relativity

"Snow White and the Huntsman" had the star power of Kristen Stewart coming off of the "Twilight" films, giving her film the advantage with the younger demographic. "Mirror, Mirror" depended too heavily on marketing the familiar face of Julia Roberts and not its younger stars Lily Collins and Armie Hammer.

Channing Tatum's "White House Down" came out three months after similar movie "Olympus Has Fallen."

The big difference here is that Film District only paid an estimated $70 million for Gerard Butler's thriller, while Sony and Columbia Pictures launched the Tatum flick at an estimated cost of $150 million. Butler's film ended up being more cost effective in the end, warranting a sequel.

24/

2013/2015: "Jobs" and "Steve Jobs" both followed the life of the former Apple CEO.

Ashton Kutcher's take on Steve Jobs was critically panned in 2013. Michael Fassbender and Kate Winslet both earned Academy Award nominations for their roles in Danny Boyle's 2015 film. Neither film was a big box-office smash.

25/

2016: "Batman v Superman" and "Captain America: Civil War" both pit legendary superheroes against each other in big brawls.

Not only were the posters for both superhero films similar — the "Civil War" poster looked like a giant zoom in of the "Batman v Superman" one — but the marketing campaigns for both superhero showdowns felt remarkably the same.

Warner Bros.' used the hashtag #WhoWillWin to get fans to root for Batman or Superman while Marvel asked fans to align with #TeamCap or #TeamIronMan ahead of the films' releases.

26/

2016/2018: Disney and Warner Bros. released live-action versions of "The Jungle Book."

The poster for Disney's "The Jungle Book" focuses more on the green forest while "Mowgli" presents the colorful world of man.
Disney, Warner Bros./Netflix

The Warner Bros.' film changed its title to "Mowgli." Unlike Disney's film, this one is a more direct adaptation of Rudyard Kipling's "The Jungle Book," starring the voice talents of Christian Bale, Benedict Cumberbatch, Cate Blanchett, and motion capture king Andy Serkis. Overall, the film is a bit darker and more mature than its counterpart.

"Girls Trip," starring Jada Pinkett Smith, Regina Hall, and Queen Latifah, became a bonafide hit for its solid casting and comedic chops. The film helped Tiffany Haddish become a break-out star since its release.

28/

2018: Both "Gnome Alone" and "Sherlock Gnomes" are computer-animated movies about gnomes getting released three weeks apart.

"Gnome Alone" was originally set for an October 2017 release but was pushed back last minute the day before the movie was supposed to hit theaters. The movie comes from newer theatrical company Smith Global Media.

"Sherlock Gnomes" is a sequel to 2011's "Gnomeo & Juliet" with the voice talents of James McAvoy, Emily Blunt, and Johnny Depp as the titular Sherlock Gnomes. The Sherlock character goes on the hunt for a number of missing gnomes. At the end of the day, neither film was fondly received by audiences.

29/

February 2019: Hulu released its "Fyre Fraud" documentary days before Netflix dropped "FYRE: The Greatest Party That Never Happened."

Netflix and Hulu released competing documentaries on the disastrous Fyre Festival in January not even a week apart.
Netflix, Hulu

Four days after Netflix revealed a trailer for its documentary on the disastrous Fyre Festival, Hulu not only announced its own documentary on the same festival, but dropped it the same day.

Hulu's documentary features an exclusive interview with festival organizer, Billy McFarland, who was sentenced to six years in prison after pleading guilty to wire-fraud charges in 2018. Netflix's documentary is produced by Vice Studios and Jerry Media, a media agency that was involved in promoting the festival. McFarland was paid an undisclosed amount to appear in the Hulu doc.

April 2019: Right before Stephen King's "Pet Sematary" hits theaters, a movie called "Pet Graveyard" will be released on DVD and digital.

Both movies feature a cat prominently on its posters hovering over a graveyard.
Paramount, Uncork'd Entertainment

Box Office "Pet Sematary": N/A "Pet Graveyard": N/A

Even the typeface on these two posters looks similar. While the names of these two films are similar, the premises appear to be a little bit different.

"Pet Sematary" is a remake of Stephen King's thriller following the Creed family who discover a cemetary on their property that's linked to an ancient burial ground. "Pet Graveyard" will focus on a group of friends who are being "tormented by the Grim Reaper and his sinister pet" after an experiment which allows them to revisit the dead.